commode (n.)
1786, "chest of drawers," earlier (1680s) name of a type of fashionable ladies' headdress, from French commode, noun use of adjective meaning "convenient, suitable," from Latin commodus "proper, fit, appropriate, convenient, satisfactory," from com-, intensive prefix (see com-), + modus "measure, manner" (see mode (n.1)). Meaning "chair housing a chamber pot" first attested 1851 from notion of "convenience."